“Invisible,” a track from U2’s Danger Mouse-produced 13th studio LP, wasn’t expected to be revealed until a Super Bowl commercial tonight, but it looks like it’s available a little early. “Invisible” is not the first single from the new album, which is now targeted for a summer release according to USA Today, but “a sneak preview — to remind people we exist,” says Bono. Stream and/or download “Invisible (RED Edit Version)” below.

U2’s re-teamed with (RED) as well as Bank Of America to make “Invisible” a free download on iTunes from now until 11:59 PM tomorrow. Grab it here. Bank Of America will donate $1 for each download to the nonprofit, which seeks to fight AIDS, TB, and malaria in Africa.

UPDATE: Here’s that Super Bowl commercial, which serves as a preview of the song’s Mark Romanek-directed video…

And here’s a short behind-the-scenes clip in which Bono describe’s the track’s origins: “The early lyrics were set on a train coming into London for the first time. I remember sleeping in Euston station, being broke… coming out of the subway into the spring of 1979, being 18 years old, it was punk rock in London…”